add_subdirectory(ch1)
add_subdirectory(ch2)
add_subdirectory(ch3/useEigen)
add_subdirectory(ch3/useGeometry)
add_subdirectory(ch3/visualizeGeometry)
add_subdirectory(ch4/useSophus)
add_subdirectory(ch5/imageBasics)
add_subdirectory(ch5/joinMap)
add_subdirectory(ch6/ceres_curve_fitting)
add_subdirectory(ch6/g2o_curve_fitting)
add_subdirectory(ch7)
add_subdirectory(ch8/LKFlow)
# add_subdirectory(ch8/directMethod)